SAP Updated C_HAMOD_2404 Exam Questions and Answers by nyra

To expose a hierarchy to SQL, the following conditions must be met:

B. The hierarchy must be a shared hierarchy: This ensures the hierarchy is reusable and can be consumed in other scenarios.

D. The hierarchy must be exposed by a CUBE calculation view with a star join: Only a cube view with a star join supports SQL exposure for hierarchies.

Local hierarchies and those defined in non-cube calculation views are not SQL-exposed.

Partition large tables (B):Partitioning tables allows for parallel processing of data subsets, significantly improving query execution times.

Limit the number of stacked calculation views (C):Reducing layers of calculation views minimizes complexity and execution overhead, leading to better performance.

Options A and D are incorrect or less effective. Union pruning should be enabled to improve performance, and while aggregating data early can sometimes be beneficial, it is not universally optimal for performance tuning.

Avoid defining joins on calculated columns (A):Joins on calculated columns can significantly impact performance because they require calculations before the join operation. It is better to minimize such scenarios.

Include all data flow logic within one calculation view (B):Consolidating logic within a single calculation view reduces complexity and improves maintainability, avoiding unnecessary data movement across multiple views.

Options C and D are less optimal because defining filters or aggregations on calculated columns can increase the computational overhead.

Performance Analysis modein SAP HANA calculation views provides insights into:

C. Information about join cardinality: It identifies whether joins are correctly defined and optimally used.

D. Joins that are defined on calculated columns: It highlights joins involving calculated columns, which can have significant performance implications.

Usage statistics (A) and memory consumption (B) are not direct outputs of Performance Analysis mode but may be derived from other tools or metrics.